Yes, the software runs tip-top on Windows 10 in all functions. It wouldn't be good of ADOBE if it didn't... Sincerely

No, it does not have to. However, it must be registered with ADOBE. Both versions would be fully functional and can be used side by side. Advantage: Some filters from earlier versions are no longer smoked on the new version 14.

Photoshop Elements 14 runs without any problems on Windows 7.

It does not need a special version, as long as you have a full version of Ph. Elements, you can use the upgrade.